| 摘要 |
PURPOSE:To apply this coupler for any definite or indefinite handset and to contain it in compactness when not in use by forming a main body holding an electroacoustic converter, a belt prolonged externally from one side of the main body and a coupling provided to the other side of the main body incorporatedly through an elastic body such as rubber. CONSTITUTION:A speaker 5 of the 1st acoustic coupler 1 is fitted to a transmission part HSa of a handset HS, a belt 12 is wound on the handset HS, and a free end 12a is inserted to a hole 13a and connected, and the elastic restoration of the belt is received by a side face with a sawtooth projection 8. In the 2nd acoustic coupler 2, a microphone 6 is fitted to a reception part HSb of the handset HS similarly. In the 1st and 2nd acoustic couplers 1, 2, they are removed from the handset when not in use and they are assembled in compactness. Flanges 7 of the belts 12, 22 are fitted each other and free ends 12a, 22a are opposed to opposite main bodies 11, 21. |
